From 5f30a69a9e617028c39ea3851b9a5de43d42a299 Mon Sep 17 00:00:00 2001
From: Kegan Dougal <kegan@matrix.org>
Date: Tue, 16 Sep 2014 11:22:40 +0100
Subject: [PATCH] Added PasswordResetRestServlet. Hit the IS to confirm the
 email/user. Need to send email.

---
 synapse/handlers/login.py | 29 ++++++++++++++++++++++++++++-
 synapse/rest/login.py     | 22 ++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/synapse/handlers/login.py b/synapse/handlers/login.py
index 6ee7ce5a2..101b9a81a 100644
--- a/synapse/handlers/login.py
+++ b/synapse/handlers/login.py
@@ -17,9 +17,11 @@ from twisted.internet import defer
 
 from ._base import BaseHandler
 from synapse.api.errors import LoginError, Codes
+from synapse.http.client import PlainHttpClient
 
 import bcrypt
 import logging
+import urllib
 
 logger = logging.getLogger(__name__)
 
@@ -62,4 +64,29 @@ class LoginHandler(BaseHandler):
             defer.returnValue(token)
         else:
             logger.warn("Failed password login for user %s", user)
-            raise LoginError(403, "", errcode=Codes.FORBIDDEN)
\ No newline at end of file
+            raise LoginError(403, "", errcode=Codes.FORBIDDEN)
+
+    @defer.inlineCallbacks
+    def reset_password(self, user_id, email):
+        is_valid = yield self._check_valid_association(user_id, email)
+        logger.info("reset_password user=%s email=%s valid=%s", user_id, email,
+                    is_valid)
+
+    @defer.inlineCallbacks
+    def _check_valid_association(self, user_id, email):
+        identity = yield self._query_email(email)
+        if identity and "mxid" in identity:
+            if identity["mxid"] == user_id:
+                defer.returnValue(True)
+                return
+        defer.returnValue(False)
+
+    @defer.inlineCallbacks
+    def _query_email(self, email):
+        httpCli = PlainHttpClient(self.hs)
+        data = yield httpCli.get_json(
+            'matrix.org:8090',  # TODO FIXME This should be configurable.
+            "/_matrix/identity/api/v1/lookup?medium=email&address=" +
+            "%s" % urllib.quote(email)
+        )
+        defer.returnValue(data)
\ No newline at end of file
diff --git a/synapse/rest/login.py b/synapse/rest/login.py
index ba49afcaa..7ab9cb51e 100644
--- a/synapse/rest/login.py
+++ b/synapse/rest/login.py
@@ -73,6 +73,27 @@ class LoginFallbackRestServlet(RestServlet):
         return (200, {})
 
 
+class PasswordResetRestServlet(RestServlet):
+    PATTERN = client_path_pattern("/login/reset")
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        reset_info = _parse_json(request)
+        try:
+            email = reset_info["email"]
+            user_id = reset_info["user_id"]
+            handler = self.handlers.login_handler
+            yield handler.reset_password(user_id, email)
+            # purposefully give no feedback to avoid people hammering different
+            # combinations.
+            defer.returnValue((200, {}))
+        except KeyError:
+            raise SynapseError(
+                400,
+                "Missing keys. Requires 'email' and 'user_id'."
+            )
+
+
 def _parse_json(request):
     try:
         content = json.loads(request.content.read())
@@ -85,3 +106,4 @@ def _parse_json(request):
 
 def register_servlets(hs, http_server):
     LoginRestServlet(hs).register(http_server)
+    PasswordResetRestServlet(hs).register(http_server)